4 replies to this topic

[somayehn]

dear all
I must design a storage tank that need coil for heating. it is a nonhelical coil inside a tank and using steam as fluid coil. what can calculate the overal heat transfer coffe for this coil?
there is no mixer for the tank.

[ankur2061]

somayehn,

You need to refer the following book:

"Process Heat Transfer" by D. Q, Kern

Refer page 720 to 722 of chapter 20 of this book. It provides the guiding equations for heat transfer coefficients for coils for both agitated and non-agitated vessels.

Hope this helps.

Regards,
Ankur.

[kkala]

Useful data could be found in the thread http://www.cheresour...1358#entry51358, in addition to useful post by Ankur. If the stored liquid is fuel oil or similar, mentioned info is applicable 100%, to my understanding. Hope of a successful effort from you.

[srfish]

Hello,

You can use the usual calculation formula for the overall heat transfer coefficient thats found in any heat transfer book, The inside film coefficient for steam will be in the 2000 t0 2500 BTU/hr-ft^2-F. It will be non-controlling and have little effect, For outside the coil, use a natural convection coefficient like the one found in Churchill and Chu, Int. J Heat Mass Transfer, 18,1975.

[somayehn]

dear all
thanks for your replies and guidance.